THE introduction of the dingo to Australia might have contributed to the downfall of some native species, such as the thylacine, but by keeping foxes and cats in check.
While a few introduced species have wreaked havoc, that most increase biodiversity, both directly and by spurring evolution. With a large proportion of species set for extinction in the coming century, we cannot be choosy about future sources of diversity. If we want thriving ecosystems we may have to embrace exotic invaders, feral animals like the dingo and perhaps even some genetically modified, cloned or artificial additions (see 鈥淩eshaping Eden: the future of biodiversity鈥�). This prospect will horrify many. But it is too late to be sentimental about the past.